棉花烂铃的气象条件及其防治对策研究

Studies on Meteorological Factors Induced Rotted Boll and Anti Rot Boll Tactics

棉花烂铃所形成的僵黄花数量，与吐絮期间的气象条件关系极为密切。据１９６０～１９８７年统计：僵黄花率与相对湿度的相关系数极显著（ｒ＝０．５０２１），与雨日的相关系数达显著标准（ｒ＝０．４４６０＊），与日照时数的相关系数为显著的负相关（ｒ＝－０．４１０６＊）。复相关系数Ｒｙ·１２的Ｆ值（Ｆ＝４．１１４５）达０．０５显著标准，复相关系数Ｒｙ·１２３的Ｆ值（Ｆ＝２．６７３）达０．１０显著标准。在防治烂铃对策中，以人工去早蕾的产量最高（１２５９．１ｋｇ／ｈｍ２），僵黄花率最低（１０．６５％）。

There was a closed relationship between the amount of immatured and rotted seed cotton induced by rotted boll and meteorological factors during harvest period. The data of1960～1987 indicated that the correlation coefficients between ratio of immatured and rottedseed cotton and ralative moisture , and rained days , and hours of sunshine were significant.The F-value of multiple correlation coefficients Ry·12 and Ry· 123 were significant at the0. 05 and 0. 10 levels, respectively. The lint yield was the highest and the ratio of immaturedand rotted seed cotton was the lowest in the treatment of removing early squares.